add unit tests for falcon-512 precompiled

evm/src/main/java/org/hyperledger/besu/evm/precompile/FalconPrecompiledContract.java

@@ -46,8 +46,7 @@ public FalconPrecompiledContract(final GasCalculator gasCalculator) {
 
   @Override
   public long gasRequirement(final Bytes input) {
-    long value = gasCalculator().sha256PrecompiledContractGasCost(input);
-    return value;
+    return gasCalculator().sha256PrecompiledContractGasCost(input);
   }
 
   @Nonnull
@@ -68,7 +67,10 @@ public PrecompileContractResult computePrecompile(
     int dataLength = input.slice(dataOffset, 32).trimLeadingZeros().toInt();
 
     Bytes signatureSlice = input.slice(signatureOffset + 32, signatureLength);
-    Bytes pubKeySlice = input.slice(pubKeyOffset + 32 + 1, pubKeyLength - 1);
+    Bytes pubKeySlice =
+        input.slice(
+            pubKeyOffset + 32 + 1,
+            pubKeyLength - 1); // BouncyCastle omits the first byte since it is always zero
     Bytes dataSlice = input.slice(dataOffset + 32, dataLength);
 
     if (LOG.isTraceEnabled()) {

evm/src/test/java/org/hyperledger/besu/evm/precompile/FalconPrecompiledContractTest.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright ConsenSys AG.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+package org.hyperledger.besu.evm.precompile;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+
+import org.hyperledger.besu.evm.frame.MessageFrame;
+import org.hyperledger.besu.evm.gascalculator.IstanbulGasCalculator;
+
+import org.apache.tuweni.bytes.Bytes;
+import org.apache.tuweni.bytes.Bytes32;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+class FalconPrecompiledContractTest {
+  final FalconPrecompiledContract contract =
+      new FalconPrecompiledContract(new IstanbulGasCalculator());
+
+  FalconPrecompiledContractTest() {}
+
+  private final MessageFrame messageFrame = mock(MessageFrame.class);
+
+  static Arguments[] parameters() {
+    return new Arguments[] {
+      Arguments.of(
+          "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",
+          null),
+      Arguments.of(
+          "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",
+          "0000000000000000000000000000000000000000000000000000000000000001")
+    };
+  }
+
+  @ParameterizedTest
+  @MethodSource("parameters")
+  void shouldRecoverAddress(final String inputString, final String expectedResult) {
+    final Bytes input = Bytes.fromHexString(inputString);
+    final Bytes expected =
+        expectedResult == null
+            ? Bytes32.leftPad(Bytes.EMPTY)
+            : Bytes32.fromHexString(expectedResult);
+    assertThat(contract.computePrecompile(input, messageFrame).getOutput()).isEqualTo(expected);
+  }
+}